Introduction
  - Perimeter illustrative
Exercises
  - Calculate perimeter -1-
  - Calculate perimeter -2-
  - Draw rectangles

Introduction
  - Area illustrative
Exercises
  - Calculate area -1-
  - Calculate area -2-
  - Draw rectangles

... for rectangles
  - summarizing exercise
  - For experts
  - Draw rectangles
... for figures
  - Calculate perimeter
  - Calculate area -1-
  - Calculate area -2-
  - Perimeter and area -profi-
... for figures -2-
  - Calculate area
  - Calculate area -2-

Metric system
  - from small to large
  - from large to small
  - Tasks for advanced students
Metric system with click
  - from small to large
  - from large to small
  - Tasks for advanced students

Discover formulas
  - Volume of a cuboid
  - Volume of a cube
Apply formulas
  - Cubic numbers memory
  - Volume of a remainder

Develop surface formula
  - Pre-exercise -1-
  - Pre-exercise -2-
  - Pre-exercise -3-
Apply surface formula
  - Calculate cuboid
  - Calculate cube

Conversion number 1000
  - m³, dm³, cm³ und mm³
Conversion number 100 & 1000
  - hL, L, cL and mL
  - ... for experts
Variable conversion problems
  - from small to large
  - from large to small
  - ... for top experts

Net of a cube
Recognize cube nets -1-
Recognize cube nets -2-
Competence-oriented problems
Draw cuboids
Net an surface area